/****************************************************************************
 *
 * Copyright 2018 Samsung Electronics All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the License.
 *
 ****************************************************************************/
/************************************************************************************
 * os/board/stm32f407-disc1/src/stm32_usb.c
 *
 *   Copyright (C) 2012-2013 Gregory Nutt. All rights reserved.
 *   Author: Gregory Nutt <gnutt@nuttx.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 3. Neither the name NuttX nor the names of its contributors may be
 *    used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
 * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 ************************************************************************************/

/************************************************************************************
 * Included Files
 ************************************************************************************/

#include <tinyara/config.h>

#include <sys/types.h>
#include <stdint.h>
#include <stdbool.h>
#include <sched.h>
#include <errno.h>
#include <debug.h>

#include <tinyara/usb/usbdev.h>
#include <tinyara/usb/usbhost.h>
#include <tinyara/usb/usbdev_trace.h>

#include "up_arch.h"
#include "stm32.h"
#include "stm32_otgfs.h"
#include "stm32f407-disc1.h"

#ifdef CONFIG_STM32_OTGFS

/************************************************************************************
 * Pre-processor Definitions
 ************************************************************************************/

#if defined(CONFIG_USBDEV) || defined(CONFIG_USBHOST)
#define HAVE_USB 1
#else
#warning "CONFIG_STM32_OTGFS is enabled but neither CONFIG_USBDEV nor CONFIG_USBHOST"
#undef HAVE_USB
#endif

#ifndef CONFIG_USBHOST_DEFPRIO
#define CONFIG_USBHOST_DEFPRIO 50
#endif

#ifndef CONFIG_USBHOST_STACKSIZE
#define CONFIG_USBHOST_STACKSIZE 1024
#endif

/************************************************************************************
 * Private Data
 ************************************************************************************/

#ifdef CONFIG_USBHOST
static struct usbhost_connection_s *g_usbconn;
#endif

/************************************************************************************
 * Private Functions
 ************************************************************************************/

/************************************************************************************
 * Name: usbhost_waiter
 *
 * Description:
 *   Wait for USB devices to be connected.
 *
 ************************************************************************************/

#ifdef CONFIG_USBHOST
static int usbhost_waiter(int argc, char *argv[])
{
	struct usbhost_hubport_s *hport;

	uvdbg("Running\n");
	for (;;) {
		/* Wait for the device to change state */

		DEBUGVERIFY(CONN_WAIT(g_usbconn, &hport));

		uvdbg("%s\n", hport->connected ? "connected" : "disconnected");

		/* Did we just become connected? */

		if (hport->connected) {
			/* Yes.. enumerate the newly connected device */

			(void)CONN_ENUMERATE(g_usbconn, hport);
		}
	}

	/* Keep the compiler from complaining */

	return 0;
}
#endif

/************************************************************************************
 * Public Functions
 ************************************************************************************/

/************************************************************************************
 * Name: stm32_usbinitialize
 *
 * Description:
 *   Called from stm32_usbinitialize very early in inialization to setup USB-related
 *   GPIO pins for the STM32F4Discovery board.
 *
 ************************************************************************************/

void stm32_usbinitialize(void)
{
	/* The OTG FS has an internal soft pull-up.  No GPIO configuration is required */

	/* Configure the OTG FS VBUS sensing GPIO, Power On, and Overcurrent GPIOs */

#ifdef CONFIG_STM32_OTGFS
	stm32_configgpio(GPIO_OTGFS_VBUS);
	stm32_configgpio(GPIO_OTGFS_PWRON);
	stm32_configgpio(GPIO_OTGFS_OVER);
#endif
}

/***********************************************************************************
 * Name: stm32_usbhost_initialize
 *
 * Description:
 *   Called at application startup time to initialize the USB host functionality.
 *   This function will start a thread that will monitor for device
 *   connection/disconnection events.
 *
 ***********************************************************************************/

#ifdef CONFIG_USBHOST
int stm32_usbhost_initialize(void)
{
	int pid;
#if defined(CONFIG_USBHOST_MSC) || defined(CONFIG_USBHOST_HIDKBD) || defined(CONFIG_USBHOST_HIDMOUSE)
	int ret;
#endif

	/* First, register all of the class drivers needed to support the drivers
	 * that we care about:
	 */

	uvdbg("Register class drivers\n");

#ifdef CONFIG_USBHOST_HUB
	/* Initialize USB hub class support */

	ret = usbhost_hub_initialize();
	if (ret < 0) {
		udbg("ERROR: usbhost_hub_initialize failed: %d\n", ret);
	}
#endif

#ifdef CONFIG_USBHOST_MSC
	/* Register the USB mass storage class class */

	ret = usbhost_msc_initialize();
	if (ret != OK) {
		udbg("Failed to register the mass storage class\n");
	}
#endif

#ifdef CONFIG_USBHOST_CDCACM
	/* Register the CDC/ACM serial class */

	ret = usbhost_cdcacm_initialize();
	if (ret != OK) {
		udbg("ERROR: Failed to register the CDC/ACM serial class: %d\n", ret);
	}
#endif

#ifdef CONFIG_USBHOST_HIDKBD
	/* Initialize the HID keyboard class */
	ret = usbhost_kbdinit();
	if (ret != OK) {
		udbg("Failed to register the HID keyboard class\n");
	}
#endif

#ifdef CONFIG_USBHOST_HIDMOUSE
	/* Initialize the HID mouse class */
	ret = usbhost_mouse_init();
	if (ret != OK) {
		udbg("Failed to register the HID mouse class\n");
	}
#endif

#ifdef CONFIG_USBHOST_XBOXCONTROLLER
	/* Initialize the HID mouse class */

	ret = usbhost_xboxcontroller_init();
	if (ret != OK) {
		udbg("ERROR: Failed to register the XBox Controller class\n");
	}
#endif

	/* Then get an instance of the USB host interface */

	uvdbg("Initialize USB host\n");
	g_usbconn = stm32_otgfshost_initialize(0);
	if (g_usbconn) {
		/* Start a thread to handle device connection. */

		uvdbg("Start usbhost_waiter\n");

		pid = task_create("usbhost", CONFIG_USBHOST_DEFPRIO, CONFIG_USBHOST_STACKSIZE, (main_t) usbhost_waiter, (FAR char * const *)NULL);
		return pid < 0 ? -ENOEXEC : OK;
	}

	return -ENODEV;
}
#endif

/***********************************************************************************
 * Name: stm32_usbhost_vbusdrive
 *
 * Description:
 *   Enable/disable driving of VBUS 5V output.  This function must be provided be
 *   each platform that implements the STM32 OTG FS host interface
 *
 *   "On-chip 5 V VBUS generation is not supported. For this reason, a charge pump
 *    or, if 5 V are available on the application board, a basic power switch, must
 *    be added externally to drive the 5 V VBUS line. The external charge pump can
 *    be driven by any GPIO output. When the application decides to power on VBUS
 *    using the chosen GPIO, it must also set the port power bit in the host port
 *    control and status register (PPWR bit in OTG_FS_HPRT).
 *
 *   "The application uses this field to control power to this port, and the core
 *    clears this bit on an overcurrent condition."
 *
 * Input Parameters:
 *   iface - For future growth to handle multiple USB host interface.  Should be zero.
 *   enable - true: enable VBUS power; false: disable VBUS power
 *
 * Returned Value:
 *   None
 *
 ***********************************************************************************/

#ifdef CONFIG_USBHOST
void stm32_usbhost_vbusdrive(int iface, bool enable)
{
	DEBUGASSERT(iface == 0);

	if (enable) {
		/* Enable the Power Switch by driving the enable pin low */

		stm32_gpiowrite(GPIO_OTGFS_PWRON, false);
	} else {
		/* Disable the Power Switch by driving the enable pin high */

		stm32_gpiowrite(GPIO_OTGFS_PWRON, true);
	}
}
#endif

/************************************************************************************
 * Name: stm32_setup_overcurrent
 *
 * Description:
 *   Setup to receive an interrupt-level callback if an overcurrent condition is
 *   detected.
 *
 * Input Parameters:
 *   handler - New overcurrent interrupt handler
 *   arg     - The argument provided for the interrupt handler
 *
 * Returned Value:
 *   Zero (OK) is returned on success.  Otherwise, a negated errno value is returned
 *   to indicate the nature of the failure.
 *
 ************************************************************************************/

#ifdef CONFIG_USBHOST
xcpt_t stm32_setup_overcurrent(xcpt_t handler)
{
	return stm32_gpiosetevent(GPIO_OTGFS_OVER, true, true, true, handler);
}
#endif

/************************************************************************************
 * Name:  stm32_usbsuspend
 *
 * Description:
 *   Board logic must provide the stm32_usbsuspend logic if the USBDEV driver is
 *   used.  This function is called whenever the USB enters or leaves suspend mode.
 *   This is an opportunity for the board logic to shutdown clocks, power, etc.
 *   while the USB is suspended.
 *
 ************************************************************************************/

#ifdef CONFIG_USBDEV
void stm32_usbsuspend(FAR struct usbdev_s *dev, bool resume)
{
	ulldbg("resume: %d\n", resume);
}
#endif

#endif							/* CONFIG_STM32_OTGFS */
